Mossyrock, WA 98570 Frost Dates
Mossyrock, WA: when does the frost end?
Around 04/07 is the usual last spring frost, about 222 days away. Fall's first freeze usually shows up around 11/13, roughly 215 days after the last spring frost.
Mossyrock sits in USDA Zone 8b (15 to 20°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
With roughly 11 weeks until Mossyrock's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Mossyrock's last frost
04/07 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/16 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/08 and only about 1 year in 10 sees frost after that.
Mossyrock against the rest of the dataset
About 215 days separate Mossyrock's last and first frost, putting it 14,150 of 40,283 ZIP codes nationally. Within WA, it ranks 258 of 700.
Learn more
Before leaning on 98570's figures: zone vs. frost date explains why Zone 8b and Mossyrock's frost date answer different questions, while the frost range explains how to read the range around Mossyrock's dates instead of trusting one.